LOS ANGELES (Zap2it.com) A man who was accused of planning to kidnap late-night host David Letterman's son has been sentenced to 10 years in prison on other charges.

Kelly Frank, 43, who worked as a painter on Letterman's Montana ranch, was sentenced to 10 years in prison Monday (Sept. 12) on charges of felony theft and misdemeanor obstruction of justice. The sentence was part of a plea deal in which prosecutors in Montana agreed to drop charges that accused Frank of plotting to abduct Letterman's son, Harry, and the boy's nanny.

The theft charge stems from Frank overcharging Letterman for painting work on the ranch, according to news reports. The obstruction count resulted from him lying to investigators about the kidnapping allegations. He also pleaded guilty to an unrelated felony involving possession of illegally killed wildlife.

Frank was arrested in March. Police say he told a friend that he could demand a large ransom from Letterman by abducting Harry, who was then 16 months old, and his nanny. The plea deal erases those charges from Frank's record.

In court Monday, Frank read a statement apologizing "for the grief this has caused," but he also maintained that he never intended to kidnap Letterman's child.